VLC media player is an open source video and audio player capable of playing almost any type of media including DVDs and VCDs. In addition to being able to play most video and audio files, VLC can also post free ads without registration
File extensions that can be opened by vlc-media-player

nwp.ASX	Advanced Stream Redirector
nwp.DTS	Digital Theater Systems Audio File
nwp.GXF	General eXchange Format
nwp.M2V	MPEG-2 Video
nwp.M3U	MP3 Uniform Resource Locator
nwp.M4V	MPEG-4 Video File
nwp.MPEG1	MPEG-1 Video
nwp.MPEG2	MPEG-2 Video
nwp.MTS	AVCHD Video File
nwp.MXF	Material eXchange Format
nwp.OGM	Ogg Multimedia Container File
nwp.PLS	Playlist
nwp.BUP	DVD Information File
nwp.A52	Dolby Digital AC-3 Compressed Audio File
nwp.AAC	Advanced Audio Coding Compressed Audio File
nwp.B4S	Winamp 3+ Playlist
nwp.CUE	Cue Sheet
nwp.DIVX	DivX Movie
nwp.DV	Digital Video
nwp.FLV	Flash Video
nwp.M1V	MPEG-1 Video
nwp.M2TS	MPEG-2 Transport Stream Videos
nwp.MKV	Matroska Video Stream
nwp.MOV	Apple QuickTime Movie
nwp.MPEG4	MPEG-4 Video
nwp.OMA	OpenMG Audio File
nwp.SPX	Ogg Speex Audio File
nwp.TS	DVD Video
nwp.VLC	VLC Media Player Data
nwp.VOB	DVD Video Object
nwp.XSPF	XML Shareable Playlist Format
nwp.DAT	VCD Video
nwp.BIN	Binary DVD Video
nwp.IFO	DVD Information File
nwp.PART	Partially Downloaded File
nwp.3G2	3G Mobile Phone Video
nwp.AVI	Audio Video Interleave
nwp.MPEG	MPEG Video
nwp.MPG	MPEG Video
nwp.FLAC	Free Lossless Audio Codec Compressed Audio FIle
nwp.M4A	MPEG-4 Audio File
nwp.MP1	MPEG-1 Audio Layer I
nwp.OGG	Ogg Multimedia Container File
nwp.WAV	Waveform Audio
nwp.XM	Extended Module Audio File
nwp.3GP	3G Mobile Phone Video
nwp.SRT	DVD Subtitles File
nwp.WMV	Windows Media Video
nwp.AC3	Dolby Digital AC-3 Compressed Audio File
nwp.ASF	Advanced Systems Format Video
nwp.MOD	MOD Audio File
nwp.MP2	MPEG-1 Audio Layer II
nwp.MP3	MPEG-1 Audio Layer 3
nwp.MP4	MPEG-4 Part 14 Multimedia Container
nwp.WMA	Windows Media Audio File
nwp.MKA	Matroska Audio Stream
nwp.M4P	Protected AAC File

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